Keywords: SP1, UCF, modify, ISE
I see the following error for a constraint that does not exist in my source files. This net name used to exist in the design. but it has been removed and no longer exists in the design or in the UCF file.
ERROR:ConstraintSystem:59 - Constraint <NET "OscOut_n" S>: NET "OscOut_n" not
found. Please verify that:
1. The specified design element actually exists in the original design.
2. The specified object is spelled correctly in the constraint source file.
What is the cause of this issue, and how can I resolve it?
There is a known issue where constraint information is being kept in an internal constraints database even after being removed from the source files. A CR is under investigation to correct this problem in a future ISE revision. Meanwhile, the problem can be corrected by performing the operation, "Cleanup Project Files" from the Project pulldown menu.